Because: ANYTHING can happen in a 13-storey treehouse.This is a major new series from Andy and Terry- and it's the logical evolution of all their previous books. There are echoes of the Just stories in the Andy and Terry friendship, the breakaway stories in the Bad Book (the Adventures of Super Finger), there's the easy readability of the Cat on the Mat and the Big Fat Cow, and like all these books, the illustrations are as much a part of the story as the story itself.

    But when she trips into a quiet boy in the hall, Jaime Thompson, she's already broken the first rule, and the mean kids start calling her the "nerder girlfriend." How does she handle this crisis? By shoving poor Jaime and running away!Falling back on rule two and surrounding herself with new friends in the art club, Peppi still can't help feeling ashamed about the way she treated Jaime. Things are already awkward enough between the two, but to make matters worse, he's a member of her own club's archrivals--the science club! And when the two clubs go to war, Peppi realizes that sometimes you have to break the rules to survive middle school!